Railroad-crossing gate



June24, 1930. H. F. c. MUSMANN RAILROAD CROSSING GATE Filed Sept. 23. 1929 2 Sheets-Sheet 1 June 24, 1930. H. F. c. MUSMANN 1,765,936

- RAILROAD .cnossme GATE 2 Sheets-Sheet 2 Filed Sept. 23. 1929.

I war/5'6. Mam/m Patented, June 24,

'- aHENRYFBITz'fbHnisTorH'lvmsmemvyoi jnnnvnn,i dononeno A ILRQM NG I i This iiiyenti'on l'elzites tde hj".eiitomztticelly operated h'ighwey crossinggate' for iriil re'ads and: hes for its principalobj'ect the, promsioiff, (if 2i gete 'of this chslecterg vhich tiv be simple {and efficient finf perat on Wh1ch 1 will be automatically "closed as .a tp'ainf ap- QffilOthGl" object of the inventwn'fis to con true the device" that will: be e emy mechanical in its op eraticn so? that it will ii ot d'e'pend upon'unceftainsQurces oii'elec- V v opposite side of the highway; The short ex tremitiesfo'f the 'gzite are used for attaching'litheopei'ating cablestohe laterfldescrihed. f 65.

"Operating shafts 16'end 16' are'installed j 'undenthe tracks 11 and 12 esuitable di's tfi'city;'co1npi'essed meets/ tillenother'cbject of the invent on Isto p ffividei a niechaniczi lly operatedc 'ossing getefin-which theshockcf"operating-from it Y rap dly 'inomng tnzhn' W lljjbelecco nmodated withoutdamageto-the-mechan smw f "A-Etuftlier object of he in, an V videimeens' for locking the, ates" iii-the open 1 position. so. thattheyv czii closed by winder tampering until tuatedbyan "zip.- 1 1 111115,"'train; i

. ciency. These Wi11'bec,0 nie "1nore app rent from the"followlngdescription. I

- in me following detailed:"descripticnbf 0f the drziyying and through In the drawing crossing with tlle inventiouinstalled thereon;

l i I V elei z tion of the g-EltGiHlQCllitIllSlll;

f .Fi 2" i's. a, dOilgltllCli'nEtl1660 010111116 eside is in the-open position.

H 4; v51. 1111 6 illustrate; difiei e it,relt} 7 tive positions ofazt ackfdog ,during ts cycle ofioperationj Fig. 7 's a side..elevationicfthe track lever mechanism esit appears henthe' get-e isy n thef'closedrpositioinq InF-ig; 1 the gates V-positidn. Actually .the getes fcculdjnot-be 1n:

preachesand automaticallyZopenedthythe I v y 7 12. The'invention'conipnses a pair 'ofvgete' s be-rs 1'3,.piv0ted on suitabie posts '14 at-eajc'h tlon'sfto'j pro Other obj ects and adventages tesic le in the :25 detail censtruction fof' the inyent onywlnch; vis designed for-simplicity,-ecenc1ny, -and efii-- is a side eleVzitionoftt-heoperating lever l nechenism ate-1t appears when the gate this positionfunless aytrein' wene" in the 5 block between the operating shaftscf t'hev i1 gate mechanism The train jhasfbeen omitted however; so as not to obstruct the ilh'i'stration l 1 [In thedrawing a, highway-'71s iilustratedlet -e lOcressihg '21; pair of mil-need tracks 11 and it si deief the "trackssoxias' to dropecross the h1ghwayl0. The long extremities 5015 the gates '13 are receivedin socket posts15 -at'the tenceeach'iside of'lthe highway. QForfthef highway. Actually they would be moiiererf motely positioned probablyabout'twothou i I sandrfeet hfi o n the' highway, depending, of

course, "upon: the speed With-Which trains cross the particular highway in question: 75,

The peiatingshafts-lG and 1:6 am car-m ied-tin suitable bearings 17 end 17, respectivel'y, andterminateattheir extremitiesjin i i operating levers 18 and 18, respective'lyi' Intermediate the 1 mils (if the tnacks ll Band 30 .12't1 a'ck degs 19 and 20, respectively, ar eise cu1e d to" the 1 operating shaft 1116i Similar ,track;dogsf19 andQ-OJa esecured to'the shat-13,16 betweenthe' rails of the-trecks l 2f and 11, re'spectiyely.-* V The extremity ofeach opemting levei 18' --is connected by means of. z -'jchain or cable 21 f- .to theshort'extremity ofo'ne othegatesl3; The "cables '21 pass ai oundaelatively lefge I ch uins j22 positioned in-pockets 33 'imniedi f "etelyfbelo ythe pivot posted 1. 7 y f: f gEach oit'tl-ielevers 18"isSih1ila-rly co-nnect-v e'd' by means of cableg21 with the short extremity Dione of the gates The ea- 1 bles 721T :pess over idl'erpulleys 23 and down Werdly-under the drums 22""before connect with"the gates.13. j The cablesfl21-and 1 21pass under guide pulleysQGimmediately I 'eheadmf-each of the levers l8end '18. I By 1 1 this construction; as the levers I18 areyswung'i ee l injverclly; they will swing the levers: l8" inf Theffextremities {of the levers 18;; and, 18

v are :eonstahtly 'pnlledf outwardly by meztns 10f balance springs j 24; JIhese springs ere designed: sokas to, substentiallyf counteract 1 s the weight of the lghllovving' a slight excess'vveight to'the' sgete Thus, the gates. 3am .sulost'antiellyIin a'ibala'nced position but ifnot held open :heve s'niiioient excess Weight V to drop tothe "closed' position and jextendthe V -springs 24. .In,each ,otthe oebles '21gand;

1 21, ashoolr spring'25is'pla'eedj edits to ab-f' j sofrb thefstreihhf anyfs udden jerk upon-the 7 "cables; 1 f 1 p L',It' will noted that when the gates rare in the; closed position of Fig;1, thetreckfdogs 5 1 9 ,an d 19 liein a depressed position be-' r tweenf therails so; as to be inoperative and I the track dogs '20 and" 20' extend upwardly" i inen" perativeposition; hen the gate is open these Conditions are reversed, that .is,

i the track dogs 19 and 19:Will5be in theoplerrative position,- While the dogs 20 20 iyvill be"clepressed.

The locomotives of are edepted ior foperation of-the automatic oross'ing'getes by seeming a shoe 27. (see.;Figs. 4, 5, end 6)," having a' beveled forward extremity 31, along their bottoms." The shoe- 27 is sup porft'ed from a suitable frame structure, SllCll as indicated at 28, upon sliding shafts 29. sh oek absorbing springs30 erepositioned 1 ctbout the sliding shafts 29 so "its to absorb the: shock of the dogs.

Let ns 'zissnme thet the gates in the -open position The operating shaft 1 6 With its 1 atteohed levers and dogs will then he in the posltion indicated 'iniFig; A train approaches the crossing 10 on the trackr ll.

A's itrea'ches the operating shaft 16 the beva:

V eled extremity-31 o1f theshoe-291Will engage V under the extremity of the dog, 19 mm 1 Q first'shock of engagement, is absorbed by the springs' 3O end by the zt ctionfof thebeveled extremity; 31' in sliding under endgradually: lifting the lever-L so as to give it-its iniby'means ofja 'base block placed there under. Thelever "19 is maintztinfed' in. the

p. 7 ,r-;- (lpr'essed position sot" Fig; 6 by the length of theshoefl'? so that it, can not rebonndi;

shoe-27 in strikingthe track V 7 r Willengegei the track clog QOJS inging 'theQ H .levers 18'to the-dead eenter. point of Fig; 3;

soias to lock them inposition; and allowing .the tension in thesprings toraise fire the time thetrain shoe leaves the lever l9,

1 9 in a, depressed; position.

and Willby their Weight maintain the lever lt WVlll stretch the shock springsrzfiin the cables 21 "and will svvingthe operating le-'T* ver's 18" f ,-a point'belovv the dead center. 86

position of 'thefaetion oit' thes'e springs, such as illustrated in Fig."3.-- Thus, thestretched ;springs eannot swing the'le'versil n-again f V "inwardly end must exert theint'ensiohonfthe i ishort extremity of the gates '13, 's o .e.s"t0* raise. the gates The train: mayPheveleft- V the shaftilsfar behindbeforethegsprings i havg'had ll i me to vercome th inertia of and raisethe gates B thi 90 i train directly Qreisethe getes 'is eliminated; V Thetrainaction only serves to stretchth r l p ng r2 The springs will then'jre t to; open the'gzttes. 7 o I 7 y 'A train approaching the crossing 'onj'treek,

structio'n the necessaryshook oiihelving' v the,

12 will gothrough a similer' series of operations, that is, itiwill svving thedOg lSD' 'in-Q' 3f werdly' solasft'oimlockj thelevers 1 8" from i e their dead center position endrelieve t'he tensionfin thehgibles 21"." so that 'the gates em lfztll by grevit y to thefolosed position.

Aftertleaving' th'e-iorossing thetrain shoe 27 i gates.

\vhioh ee-se both'dog's 19 and 20, and 19? and.

' It isdesired 0211: attention to thqjface E20" woiild be positioned betweenftheirails, of 1 i i *the one track and thez train ould fbe}pro r vi'd eclwith two of the train shoes 27; One y of the shoes'wonldbe positioned so to en- V a t 'el rotation, Furthermovem'entof thetrain I i V 7, Will swing thetr'aok dogs through the pOsi-"i tion of FigQfi to theposition of Fig.6; -The (further movement 'ofthe levers is prevented that the operation of the-devise would potb'e ,felfecte'cl by two' trains ztpproeohingfisimul te neonslysandpassing eaoh otlierwithin the w blooksdefinedbythe shaftslfihnd l6'-. Thex lest train-to enter the block would t i-f gage l in e thejleverss .19

and 19" would be depressed at "that time; The first train to leave open the gates.

W'hilee Vspecifie form of the improvement 1 has been; described and illustrated herein, 'it' is desired to be understood that the same 1251 the blo kweld then; H

ids 5 or V, p r J 1 1 gage thefleverslQend 19f andtheothershoe g' so es to engege-the shoes' 20 and 20' "ma be varied, within theseope' of the a'ppended claims, Without, departing from the 7 jHaving thus described thetini ention, What i is and desired sejcured' by Letters Patent is F I gate; a'leyer on the extreniity ofeach ofsaid operating shaft-s; cables. extending from the spirit of the invention.

is icl'ainied 11A railway crossing'gate comprising: a

support adapted to bejpositio'nedat thesi de of a railway track; a gate pivoted to said "support; a pair of operating shaftsextending under said tracks at each side of said eXtrernitiesOfeach of said leyers to; one ex-' trem ty of saidga'te; a druni j ournaled below I said support, both saidcables passing about I :said cables; a-balance springfor each] of sa d levers andoperative'ly'connected there;

' Y ignide-pulleysbeingpositionedso as to mainsaid drum; a tension spring positioned inith so; as to pull said levers away from-said gate; track dogs secured to said, shaftbe -ve i v tween the rails of said 't'ra'eki; 1 and means p ube carried; by. a train to engage i said dogs: so as to rotate said shaft; and a. guide fp'ulley for 1 each 7 of said 76313185, said] .tainf'said' cables in a deadice'nter. position. with-reference'to sa d levers when'sai'dgate fishaft'positioned lat eachsid'e ofsaidhigh. -Way beneath said track; operatinglever 0 secured 'to-mthe -egrtremitypof each of said 1' is in the open-positionso as t'o' lock said gate n; the open are actuated.

position until said track dogs "12. A rai-lii aycrossing gate comprisingzsa a support;-;a gate pivotedin said support ;;So; aS to havel a long extremity extending 35 extremity a drum journalechin .a-pocket be-r across said highway and a; short actuating low" said, actuating extremity; an? operating shafts; cable s,;'co11necting --sa id, operating levers, to the short, extremity of I said gate "andrpas'sing around said'drum'; a pair of track dogs secured to each: of sai'd'shafts, 7

saidtrack dogs being positioned so that when said operating leverfis at? one extremity of f its travel one dog will bej 'infthe' operative "ingalever to stretchjthespring in its cable,

position and the; other in i the inoperative position and when-saidflever is 'at the; other extremity of its travel :these conditions 'will be reversed; afspring' in said cables; and

other of said shafts so as toswing itsoperatsaid levers being arranged tdsWing beyond the-dead cfenterp'oint of the action of said 5, spring so as 'to prevent.said springs. from f returning said levers. v

'. lntjestirnony Whe e0f,-I affi xfmy signatures 

